Zach's mom has a new patient—a giant dog named Millie who has been helping her owner train for a marathon. Millie's knees can't handle all that running and now she needs an expensive operation! Time for the kids in the Pet Rescue Club to help! Together they find a way to help Millie.

Read a book and help save a life: 5-7% of the purchase price of every ASPCA® Pet Rescue Club book goes directly to The American Society for the Prevention of Cruelty to Animals® (ASPCA) so it can continue its mission of helping the homeless, with a minimum donation of $50,000 through December 2019.